JB/T 7027-2002 300MW以上汽轮机转子体锻件技术条件
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来源:标准资料网
基本信息
| 标准名称： | 300MW以上汽轮机转子体锻件技术条件 |
| 英文名称： | Specification for steel forgings for steam turbine rotors(300MW or above) |
| 中标分类： |
机械 >>
加工工艺 >>
锻压 |
| ICS分类： |
冶金 >>
钢铁产品 >>
钢铁锻件
|
| 替代情况： | JB/T 7027-1993 |
| 发布日期： | 2002-12-27 |
| 实施日期： | 2003-04-01 |
| 首发日期： | 1900-01-01 |
| 作废日期： | 1900-01-01 |
| 出版日期： | 1900-01-01 |
| 页数： | 12 页 |
适用范围
本标准规定了300MW及以上汽轮机有中心孔转子体用真空处理的合金钢锻件的技术要求、试验方法、检验规则、合格证书及标志等。
前言
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引用标准
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所属分类： 机械 加工工艺 锻压 冶金 钢铁产品 钢铁锻件
Product Code:SAE AMS5889
Title:Nickel Alloy, Corrosion and Heat Resistant, Sheet and Strip, 54Ni - 22Cr - 12.5Co - 9.0Mo - 1.2Al, Consumable Electrode or Vacuum Induction Melted, Annealed
Issuing Committee:Ams F Corrosion Heat Resistant Alloys Committee
Scope:This specification covers a corrosion and heat resistant nickel alloy in the form of sheet and strip.【英文标准名称】:Industrialcommunicationnetworks-Fieldbusspecifications-Part4-2:Data-linklayerprotocolspecification-Type2elements
【原文标准名称】:工业通讯网络.数据总线规范.第4-2部分:数据联络层协议规范.2型元件
【标准号】:IEC61158-4-2-2007
【标准状态】:作废
【国别】:国际
【发布日期】:2007-12
【实施或试行日期】:
【发布单位】:国际电工委员会(IX-IEC)
【起草单位】:IEC/SC65C
【标准类型】:()
【标准水平】:()
【中文主题词】:总线系统;总线;电路网络;通信;控制设备;控制系统;控制工艺学;数据通信;数据链层;数据连接系统;数据处理;数据设备;数据传送;定义;数字的;数字数据;数字工程;数字信号;电子数据处理;电气工程;电子仪器;电子系统;现场总线;制导系统;工业的;工业设施;信息交换;信息处理;信息技术;接口;链路层;开放系统互连;OSI;过程控制;过程控制工程;过程控制系统;协议规范;协议;信号;规范;规范(验收);传输媒质;传输协议
【英文主题词】:Bussystems;Buses(dataprocessing);Circuitnetworks;Communication;Controlequipment;Controlsystems;Controltechnology;Datacommunication;Datalinklayers;Datalinksystem;Dataprocessing;Dataservices;Datatransfer;Definitions;Digital;Digitaldata;Digitalengineering;Digitalsignals;EDP;Electronicinstruments;Electronicsystems;Englishlanguage;Fieldbus;Guidancesystems;Industrial;Industrialfacilities;Informationinterchange;Informationprocessing;Informationtechnology;Interfaces;Interfaces(dataprocessing);Linklayers;Opensystemsinterconnection;OSI;Processcontrol;Processcontrolengineering;Processcontrolsystems;Protocolspecification;Protocols;Signals;Specification;Specification(approval);Transmissionmedia;Transmissionprotocol
【摘要】:1.1GeneralThedata-linklayerprovidesbasictime-criticalmessagingcommunicationsbetweendevicesinanautomationenvironment.Thisprotocolprovidescommunicationopportunitiestoallparticipatingdata-linkentities,sequentiallyandinacyclicsynchronousmanner.Foregroundscheduledaccessisavailablefortime-criticalactivitiestogetherwithbackgroundunscheduledaccessforlesscriticalactivities.Deterministicandsynchronizedtransferscanbeprovidedatcyclicintervalsupto1msanddeviceseparationsof25km.Thisperformanceisadjustabledynamicallyandon-linebyreconfiguringtheparametersofthelocallinkwhilstnormaloperationcontinues.Bysimilarmeans,DLconnectionsandnewdevicesmaybeaddedorremovedduringnormaloperation.Thisprotocolprovidesmeanstomaintainclocksynchronizationacrossanextendedlinkwithaprecisionbetterthan10μs.ThisprotocoloptimizeseachaccessopportunitybyconcatenatingmultipleDLSDUsandassociatedDLPCIintoasingleDLPDU,therebyimprovingdatatransferefficiencyfordatalinkentitiesthatactivelysourcemultiplestreamsofdata.Themaximumsystemsizeisanunlimitednumberoflinksof99nodes,eachwith255DLSAPaddresses.Eachlinkhasamaximumof224relatedpeerandpublisherDLCEPs.1.2SpecificationsThisstandardspecifiesa)proceduresforthetimelytransferofdataandcontrolinformationfromonedata-linkuserentitytoapeeruserentity,andamongthedata-linkentitiesformingthedistributeddatalinkserviceprovider;b)thestructureofthefieldbusDLPDUsusedforthetransferofdataandcontrolinformationbytheprotocolofthisstandard,andtheirrepresentationasphysicalinterfacedataunits.1.3ProceduresTheproceduresaredefinedintermsofa)theinteractionsbetweenpeerDL-entities(DLEs)throughtheexchangeoffieldbusDLPDUs;b)theinteractionsbetweenaDL-service(DLS)providerandaDLS-userinthesamesystemthroughtheexchangeofDLSprimitives;c)theinteractionsbetweenaDLS-providerandaPh-serviceproviderinthesamesystemthroughtheexchangeofPh-serviceprimitives.1.4ApplicabilityTheseproceduresareapplicabletoinstancesofcommunicationbetweensystemswhichsupporttime-criticalcommunicationsserviceswithinthedata-linklayeroftheOSIorfieldbusreferencemodels,andwhichrequiretheabilitytointerconnectinanopensystemsinterconnectionenvironment.Profilesprovideasimplemulti-attributemeansofsummarizinganimplementation’scapabilities,andthusitsapplicabilitytovarioustime-criticalcommunicationsneeds.1.5ConformanceThisstandardalsospecifiesconformancerequirementsforsystemsimplementingtheseprocedures.Thisstandarddoesnotcontainteststodemonstratecompliancewithsuchrequirements.
【中国标准分类号】:N18;P76
【国际标准分类号】:25_040_40;35_100_20;35_160;35_240_50
【页数】:224P;A4
【正文语种】:英语
